Time-course of lipoxygenase, antioxidant enzyme activities and H2 O2 accumulation during the early stages of Rhizobium-legume symbiosis
• The involvement of lipoxygenase and antioxidant enzyme activities as well as hydrogen peroxide (H2 O2 ) accumulation are reported during early infection steps in alfalfa (Medicago sativa) roots inoculated either with a wild type Sinorhizobium meliloti or with a mutant defective in Nod-factor synt...
| Veröffentlicht in: | The New phytologist. - 1979. - 152(2001), 1 vom: 01. Okt., Seite 91-96 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2001
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| Zugriff auf das übergeordnete Werk: | The New phytologist |
| Schlagworte: | Journal Article Sinorhizobium-legume interaction ascorbate peroxidase (APX) catalase (CAT) glutathione reductase (GR) hydrogen peroxide (H2O2) lipid hydroperoxides lipoxygenase (LOX) superoxide dismutase (SOD) |
| Zusammenfassung: | • The involvement of lipoxygenase and antioxidant enzyme activities as well as hydrogen peroxide (H2 O2 ) accumulation are reported during early infection steps in alfalfa (Medicago sativa) roots inoculated either with a wild type Sinorhizobium meliloti or with a mutant defective in Nod-factor synthesis (Nod C- ). • Compatibility between M. sativa and Rhizobium correlates, at least in part, with an increase in the activities of these enzymes, particularly catalase and lipoxygenase, during the preinfection period (up to 12 h). The mutant strain, defective in Nod-factor biosynthesis, showed a decrease in all enzyme activities assayed, and an increase in H2 O2 accumulation. • Enhancement of scavenging activities for several reactive oxygen species correlated with compatibility of the S. meliloti-alfalfa symbiosis, whereas the Nod C- strain triggered a defence response. Nod factors were essential to suppress this response. • Increase in lipoxygenase and lipid hydroperoxide decomposing activities, observed during the first hours after inoculation with a compatible strain, could be related to tissue differentiation and/or the production of signal molecules involved in autoregulation of nodulation by the plant |
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| Beschreibung: | Date Revised 17.08.2022 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1469-8137 |
| DOI: | 10.1046/j.0028-646x.2001.00246.x |